Al Voluntarily Becomes Intoxicated at a Local Bar

Al voluntarily becomes intoxicated at a local bar.While he is drunk,he still has a degree of reason and judgment.He sells his car for half of its value simply to irritate his wife.Later when sober,Al and his wife want the car back.This contract:

A) is void because of a lack of genuineness of assent.
B) is enforceable due to promissory estoppel.
C) is unenforceable due to duress and undue influence.
D) can be voided by Al or his wife.